Is there an option to export the address book and messages from Thunderbird ? I just cannot seem to find the export option.

Also, if I do manage to export the messages from a 32bit version of Thunderbird, will a 64bit version of Thunderbird be able to import them ?

I am trying to piggy back my address book and messages from Outlook Express on my old WinXP PC to Thunderbird 64bit on my new Windows7 PC. I have imported the address book and messages from Outlook Express on my old PC into a 32 bit version of Thunderbird on the old PC but cannot get any further.